I just saw in the documentation, uploading correctly now. <please accept my PR>

domains/_vercel.ericksantos.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+      "username": "erickjonatthan",
+      "email": "erick.jonathan@ufrpe.br"
+  },
+  "record": {
+      "TXT": "vc-domain-verify=ericksantos.is-a.dev,b3536d938f21875ae7fb"
+  }
+}

domains/ericksantos.json

@@ -1,12 +1,9 @@
 {
-    "description": "Personal subdomain",
-    "repo": "https://github.com/Erickjonatthan/portfolio-ejms",
     "owner": {
-      "username": "Erickjonatthan",
-      "email": "erick.jonathan@ufrpe.br"
+        "username": "erickjonatthan",
+        "email": "erick.jonathan@ufrpe.br"
     },
     "record": {
-      "CNAME": "portfolio-ejms.vercel.app"
+        "CNAME": "portfolio-ejms.vercel.app"
     }
-  }
-  
+}